Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4SDP callsign genealogy
Currently held by Whitley, Mel W
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by N4SDP's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held N4SDP.
- Whitley, Mel WTXgranted 2010-03-26cancelled 2022-03-29